TI-2026-26262 Aliases CVE-2026-33904 GHSA-9h59-p45g-445h

Ella Core has a Denial of Service via SCTP connection cleanup deadlock

LOW 28CWE-833Published 2026-03-27 · Updated 2026-03-31

Key facts

Attack vector: Adjacent network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

Ella Core is a 5G core designed for private networks. Prior to version 1.7.0, a deadlock in the AMF's SCTP notification handler causes the entire AMF control plane to hang until the process is restarted. An attacker with access to the N2 interface can cause Ella Core to hang, resulting in a denial of service for all subscribers. Version 1.7.0 adds deferred Radio cleanup in serveConn SCTP server so that every connection exit path removes the radio. Remove the stale-entry scan from SCTP Notification handling.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00173 6th percentileScored 2026-11-07

Fix Fixed core (ellanetworks): 1.7.0github.com/ellanetworks/core (Go): 1.7.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
ellanetworks	core	before 1.7.0	1.7.0	Patch available	CNA
—	github.com/ellanetworks/core (Go)	before 1.7.0	1.7.0	Patch available	GHSA-9h59-p45g-445h

core Vendorellanetworks Affected before 1.7.0 Fixed in 1.7.0 Patch available CNA
github.com/ellanetworks/core (Go) Vendor— Affected before 1.7.0 Fixed in 1.7.0 Patch available GHSA-9h59-p45g-445h

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:ellanetworks:ella_core::::::::	before 1.7.0	Vulnerable	ellanetworks

cpe:2.3:a:ellanetworks:ella_core:*:*:*:*:*:*:*:* Versions before 1.7.0 Vulnerable ·ellanetworks

Remediation

Fix · CNA core (ellanetworks) Fixed in 1.7.0
Fix · GHSA-9h59-p45g-445h github.com/ellanetworks/core (Go) Fixed in 1.7.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-33904
2026-10-03 Alias added: GHSA-9h59-p45g-445h

References

Patch 1

https://github.com/ellanetworks/core/commit/999f606c5cae261471d9e3f063d7ecd1bd754076

Advisory 2

Other 2

TI-2026-24847 Ella Core: Unauthenticated AMF DoS via malformed InitialUEMessage with undersized integrity-protected NAS payload CVSS 3.1HIGH 7.5
TI-2026-26264 Ella Core has Privilege Escalation via Database Restore by NetworkManager role CVSS 3.1HIGH 7.2
TI-2026-25694 Ella Core panics on malformed ULNASTransport Message without a Request Type CVSS 3.1HIGH 7.5
TI-2026-25693 Ella Core panics on malformed NGAP Location Report CVSS 3.1HIGH 7.5
TI-2026-25692 Ella Core panics on invalid PDU Session IDs in NGAP messages CVSS 3.1HIGH 7.5
TI-2026-24848 Ella Core: AMF DoS via malformed PathSwitchRequest with empty NR security capability bitstrings CVSS 3.1HIGH 7.5

See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences